How did World War I change the way wars were fought?

What events brought on the end of the cold war? Why did the European nations support militarism? Who fought the germans in world war 2? Which country first used the fountain pen? How did green knight challenge arthur and his knights? During what did the Japanese force captured American and Filipino soldiers to march for five days and nights? What are the main causes of retrenchment? Can active duty military members join a militia? After world war 1 the general feeling of the most Americans was? What affected the development of the Middle East after World War 2? Who was the First soldier shot in civil war? Did world war 2 end when the Holocaust ended? How long did it take for the bomb fat boy to drop? Who was the most successful general during the civil war? Was gas in World War 1 used for fear? What does the word alpha means in military? What was one major objective of the marshall plan following world war ii? The US troop surge in Iraq in 2007? Who was the commander of the U'S naval forces in the pacific during world war 2? What did the Americans call Japanese during World War 2?